1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afa69c9a626f2f8a8be610c4563207a37adedecaf21b18751c5a90dde3ab1f7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af168449-cbb8-4afb-9bf1-3f48c35ab67d.json and https://artists.proofprofile.net/proofs/artist/af168449-cbb8-4afb-9bf1-3f48c35ab67d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Moonlight Sonata (3rd Movement) – Reimagined